DSpace Collection:http://hdl.handle.net/1834/1045
Wed, 04 Mar 2015 00:09:41 GMT2015-03-04T00:09:41ZTechno economic considerations of shark driftnet fishery off Lagos, Nigeriahttp://hdl.handle.net/1834/1294
Title: Techno economic considerations of shark driftnet fishery off Lagos, Nigeria
Authors: Udolisa, R.E.K.
Abstract: Experimental fishing operations with driftnets were conducted in Lagos coastal waters with a view to finding out appropriate gear for effective exploitation of sharks and other pelagic fish species that are not normally caught in trawls. The design and fabrication of the driftnet as well as the fishing trails were undertaken b/w May 1977 and April 1978. Nine driftnets of equal panels have three different streched mesh sizes of 190.5mm, 228.3mm respectively. Six of the driftnets were baited while three were unbaited. Analyses were carried out on species composition of catches by weight and number, catch efficiency of the driftnet as well as the operating cost and financial returns.Wed, 10 Nov 1982 00:00:00 GMThttp://hdl.handle.net/1834/12941982-11-10T00:00:00ZSpecies composition, distribution and resource pontentials fisheries recorded in bottom trowling betweem 50 and 200M depth off Nigerian the Coast.http://hdl.handle.net/1834/2219
Title: Species composition, distribution and resource pontentials fisheries recorded in bottom trowling betweem 50 and 200M depth off Nigerian the Coast.
Authors: Amadi, A.A.
Abstract: 15 trawl hauls in the 50-200m-depth zone of the Nigerian continental shelf yielded 8092 fishes from 38 families comprising 48 species. Dentex angolensis, Dentex congoensis, priacanthus arenatus and Ariomma bondi were identified as the dominant species. Their resource potential in the area should be further investigated
Description: 29pp, illus,tablesFri, 01 Jan 1982 00:00:00 GMThttp://hdl.handle.net/1834/22191982-01-01T00:00:00ZSeasonal variation in surface temperature and salinity around Lagos harbour, Nigeriahttp://hdl.handle.net/1834/1270
Title: Seasonal variation in surface temperature and salinity around Lagos harbour, Nigeria
Authors: Oyewo, E.O.; Ajao, E.A.; Orekoya, T.
Abstract: Continuous monitoring of Sea and Harbour (Lagoon) Surface temperature and salinity at two stations has been carried out from 1978 to 1981. This paper presents the findings for the period and relates it to the prevailing meteorological regimes.
The pattern of sea surface temperature at Victoria beach in the study period shows a clearly defined mean maximum temperature of 29.34oC in April, and clearly defined mean minimum temperature of 25.63 in August. Depending on the year, there may be a less clearly defined mean maximum and minimum temperature in October/November and in January respectively. The pattern of surface temperature in the Harbour station is basically similar.
The salinity cycle especially in the Harbour was found to be critically dependent on rainfall. Practical salinity values as low as zero was recorded in the Harbour during the rainy season while in the dry season, values greater than 30.0 were sometimes recorded. The effect of rainfall on sea surface salinity was expectedly less significant.Fri, 01 Jan 1982 00:00:00 GMThttp://hdl.handle.net/1834/12701982-01-01T00:00:00ZReview of the state of pollution of the Lagos lagoonhttp://hdl.handle.net/1834/2213
Title: Review of the state of pollution of the Lagos lagoon
Authors: Ajao, E.A.
Abstract: Guinea coast. It is a shallow expanse of water with restricted circulation in a micro-tidal environment. This aquatic resource of multiple usages receives inputs of domestic The Lagos Lagoon is the largest of the four lagoon systems of the Gulf of hydrocarbon cooling water from a thermal power station and emissions from automobile exhaust. Micro-pollutants examined in the water, sediment and biota have included organic waste, trace heavy metals and chlorinated hydrocarbons. Concentrations detected have identified â hot spotsâ and relatively unpolluted areas for the different contaminants in the lagoon. The results show marked variations and non-uniform distribution from one season to another. It has been difficult to differentiate pollution effects from natural variations in the general milieu of contaminated water. A monitoring program is recommended as a measure to restore the water quality following compliance with management policies and regulatory framework introduced for the protection of the coastal water.
Description: 19pp, illus, tables.Mon, 01 Jan 1996 00:00:00 GMThttp://hdl.handle.net/1834/22131996-01-01T00:00:00Z